Pay attention to the potential of memory upgrade.
According to the load of Windows 10 system and current software games, it is necessary to select 8GB memory in one step. For users who have to buy a low-profile notebook with only 4GB of built-in memory due to limited budget, they must pay attention to the memory upgrade potential of the notebook-is there an extra memory slot for later upgrade?
If the notebook is designed with on-board memory, there is only one way to replace the notebook if you encounter software or games that eat memory in the future.
In addition, some notebooks with 8GB of memory as standard use a combination of 4GB+4GB of dual memory, which will be more troublesome to upgrade in the future. Either choose to upgrade larger memory to form asymmetric dual channels, or replace two at the same time, which is more expensive.
In addition, in order to "slim down", thin and light books generally choose the design of full on-board memory, or 4GB of on-board memory particles+1 memory slot. Only a few products will choose to provide only one memory bank (which can only run in a single channel, which will affect the nuclear display performance of processor integration) or two memory banks.
Careful users may find another problem. It's 20 19 now. Why do many thin notebooks with onboard memory still cling to the "thigh" of DDR3? Whether it is Dell XPS 13 or Apple's new generation MacBook 13, its on-board memory specification is LPDDR3-2 133MHz. In contrast, many thin and light notebooks are also on-board memories, but DDR4-2400MHz or even higher frequency memories are selected. Is DDR3 cheaper than DDR4, so OEMs want to save money from this aspect?
From the cost point of view, LPDDR3 may be lower than DDR4, so it makes sense from this point of view. However, from a more rational analysis, there are still some reasons why thin and light books favor on-board LPDDR3 memory.
First of all, what kind of memory a notebook uses is limited by the processor platform. For example, AMD mobile Ruilong platform only supports DDR4 memory, so it is DDR4 memory regardless of the price of Ruilong notebook. Even Intel's latest ninth-generation Core platform is compatible with DDR4 or LPDDR3, leaving a "back door" for the latter.
In addition, the ultra-thin notebook motherboard is very small, and the space that can accommodate memory particles is smaller, and only a limited number of DRAM memory particles can be arranged. The problem is that the size of LPDDR3 memory particles is smaller than that of DDR4 memory particles, so people usually cram more LPDDR3 particles into a limited space in exchange for larger memory capacity.
Main board structure of Apple's MacBook is very representative.
Fortunately, the memory specification of thin and light notebook is LPDDR3 or DDR4, which is not noticeable in daily experience. Therefore, we just need to know what we are doing and don't have to worry too much about the memory version.
SSD only looks at capacity, and you lose.
As we all know, SSD has the read-write performance of killing HDD, which is the guarantee of fast startup and high-speed response, so it is right to pursue a larger SSD.
However, although the larger the capacity, the stronger the performance (small capacity version of the same model), but there are still advantages and disadvantages. If there are two notebooks with similar workmanship, (other) configuration and price, you only recognize the model with higher SSD capacity, and you may lose at the starting line.
To put it simply, at least one M.2 slot is built in both the light and thin books and the game books, and SSD with M.2 interface is also popular.
However, there are three versions of M.2 SSD: SATA, PCIe 3.0×2, PCIe 3.0×3 (PCIe channel hard disk generally adopts NVMe protocol, so it is also called NVMe SSD). Their continuous reading speeds are about 550MB/s, 1500MB/s and 3000MB/s respectively, and the fastest is 6 times faster than the slowest!
The continuous reading performance of SN750 is about 60% different from that of OEM SSD.
In addition, when M.2 SSD is matched with different NAND flash memories (TLC or QLC, and different 3D layers) and main control chips, the performance may fluctuate by 30%~50%. Many men's products with obviously lower prices will generally choose OEM M.2 SSD with SATA or PCIe 3.0×2 channels, while Samsung PM98 1 or SN7x0 will be selected for higher-priced models.